As we all know a file is a metalworking and woodworking tool used to cut and grind away fine material to shape and smooth a workpiece. Files generally come as hand tools with a metal bar coated in a hardened surface such as lots of parallel sharp teeth. These files have now been adapted and developed with abrasive surfaces such as diamond abrasives. They are still termed ‘files’ due to their similar form and function. Instead of having teeth cut into the files working surface, diamond files have small particles of industrial diamonds embedded in their surface. The use of diamonds in this manner allows the file to be used effectively against extremely hard materials, such as stone, glass or very hard metals such as hardened steel or carbide against which a standard steel file is ineffective. Needle files are smaller files that are used in applications where the surface finish takes priority over metal removal rates but they are most suited for smaller work pieces.The Rolson 246215 diamond coated needle file set has been manufactured with a diamond coated and 150 grit needle coating with soft rubber cushioned grip handles for the comfort needed when using for long periods. This set includes 5 of the most popular shapes with an overall length of 140mm which makes them ideal for intricate work.